If your having trouble finding RIA servers on the Enemy Territory server list, here are the IP addresses for RIA servers:
<|RIA|>Trickjump : 208.64.36.81:27970
<|RIA|>TC:E : 208.64.36.81:27996
<|RIA|>Panzer : 208.64.36.81:27973
<|RIA|>Mercineries : 208.64.36.81:27996